/*
 * Copyright (C) 2012 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.android.deskclock.clockwidget;

import android.appwidget.AppWidgetManager;
import android.content.Context;
import android.content.res.Resources;
import android.os.Bundle;
import android.util.TypedValue;
import android.widget.RemoteViews;


public class WidgetUtils {
    static final String TAG = "WidgetUtils";

    public static void setClockSize(Context context, RemoteViews clock, float scale) {
        float fontSize = context.getResources().getDimension(R.dimen.widget_big_font_size);
        clock.setTextViewTextSize(
                R.id.the_clock, TypedValue.COMPLEX_UNIT_PX, fontSize * scale);
    }

    // Calculate the scale factor of the fonts in the widget
    public static float getScaleRatio(Context context, Bundle options, int id) {
        if (options == null) {
            AppWidgetManager widgetManager = AppWidgetManager.getInstance(context);
            if (widgetManager == null) {
                // no manager , do no scaling
                return 1f;
            }
            options = widgetManager.getAppWidgetOptions(id);
        }
        if (options != null) {
            int minWidth = options.getInt(AppWidgetManager.OPTION_APPWIDGET_MIN_WIDTH);
            if (minWidth == 0) {
                // No data , do no scaling
                return 1f;
            }
            Resources res = context.getResources();
            float density = res.getDisplayMetrics().density;
            float ratio = (density * minWidth) / res.getDimension(R.dimen.min_digital_widget_width);
            // Check if the height could introduce a font size constraint
            int minHeight = options.getInt(AppWidgetManager.OPTION_APPWIDGET_MIN_HEIGHT);
            if (minHeight > 0 && (density * minHeight)
                    < res.getDimension(R.dimen.min_digital_widget_height)) {
                ratio = Math.min(ratio, getHeightScaleRatio(context, options, id));
            }
            return (ratio > 1) ? 1 : ratio;
        }
        return 1;
    }

    // Calculate the scale factor of the fonts in the list of  the widget using the widget height
    private static float getHeightScaleRatio(Context context, Bundle options, int id) {
        if (options == null) {
            AppWidgetManager widgetManager = AppWidgetManager.getInstance(context);
            if (widgetManager == null) {
                // no manager , do no scaling
                return 1f;
            }
            options = widgetManager.getAppWidgetOptions(id);
        }
        if (options != null) {
            int minHeight = options.getInt(AppWidgetManager.OPTION_APPWIDGET_MIN_HEIGHT);
            if (minHeight == 0) {
                // No data , do no scaling
                return 1f;
            }
            Resources res = context.getResources();
            float density = res.getDisplayMetrics().density;
            // Estimate height of date text box - 1.35 roughly approximates the text box padding
            float lblBox = 1.35f * res.getDimension(R.dimen.label_font_size);
            // Ensure divisor for ratio is positive number
            if (res.getDimension(R.dimen.min_digital_widget_height) - lblBox > 0) {
                float ratio = ((density * minHeight) - lblBox)
                        / (res.getDimension(R.dimen.min_digital_widget_height) - lblBox);
                return (ratio > 1) ? 1 : ratio;
            }
        }
        return 1;
    }

    /***
     * Set the format of the time on the clock accrding to the locale
     * @param clock - view to format
     * @param amPmFontSize - size of am/pm label, zero size means no am/om label
     * @param clockId - id of TextClock view as defined in the clock's layout.
     */
    public static void setTimeFormat(RemoteViews clock, int amPmFontSize, int clockId) {
        if (clock != null) {
            // Set the best format for 12 hours mode according to the locale
            clock.setCharSequence(clockId, "setFormat12Hour", Utils.get12ModeFormat(amPmFontSize));
            // Set the best format for 24 hours mode according to the locale
            clock.setCharSequence(clockId, "setFormat24Hour", Utils.get24ModeFormat());
        }
    }
}

